【Privacy Function】 Crystal door knobs with lock are privacy function means it could be locked inside, without keys. Exterior privacy release button that unlock with coin or standard screwdriver only need. 【Flexible & Adjustable】 Glass door knob set is universal for your left or right handed doors, the latch can be adjusted to 60mm(2-3/8”) or 70mm (2-3/4\"), fit for common door thickness from 30 to 50mm (1.18” to 1.96\") . 【Easy to Installation】 You can easily install this exquisite crystal ball lock by yourself with just a screwdriver, no need for professional door fitters. 【Application】The matte black crystal door knobs with lock are privacy function(Keyless), perfect upgrade for bedroom and bathroom doors. It’s not just a door knob and sure to add a touch of sophistication to your home. 【Trustworthy Service】 If our product has any delivery or quality issue, Please feel free to contact us anytime. LOQRON Customer Service Team will be at your service 24 hours a day. › See more product details